✪ Choose the correct option.
What will be the output of the program?
class s1 implements Runnable {
int x = 0, y = 0;
int addX() {
x++;
return x;
}
int addY() {
y++;
return y;
}
public void run() {
for(int i = 0; i < 10; i++)
System.out.println(addX() + " " + addY());
}
public static void main(String args[]) {
s1 run1 = new s1();
s1 run2 = new s1();
Thread t1 = new Thread(run1);
Thread t2 = new Thread(run2);
t1.start();
t2.start();
}
}